Periodic Trends

Which element in the pair of adjacent elements, Mg and Na,has a higher first ionization energy?

• Na

• Mg

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As you move across the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.
• the atoms have less mass
• the atoms have more protons.
• the atoms have less electrons.

Which of the following is true about a sulfur atom and a chlorine atom?

• Sulfur is larger and has higher ionization energy.
• Sulfur is larger and has lower ionization energy.
• Sulfur is smaller and has higher ionization energy.
• Sulfur is smaller and has lower ionization energy.

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NGSS.HS-PS1-1

Across a period, Ionization energy ____a____

Down a group, ionisation energy ____b_____

• a : increase

  b: decrease

• a : increase

  b: increase

• a : decrease

  b: decrease

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NGSS.HS-PS1-1

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Which element has the greatest ionization energy: Aluminum (Al)    or    Chlorine (Cl)?

• Aluminum (Al)

• Chlorine (Cl)

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Energy is required to remove an electron from the atom.

• True
• False
• Not sure

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NGSS.HS-PS1-4

What elements have zero electronegativity?

• metals
• nonmetals
• metalloids
• noble gases

What does electronegativity do as you go across a period?

• decrease

• no pattern

• stay the same

• increase

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NGSS.HS-PS1-1

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The element with the largest electronegativity in the halogens is - 

• At
• F
• Cl
• Br

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NGSS.HS-PS1-1

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The atom with the largest atomic radius in Group 18 is - 

• Ar
• He
• Kr
• Rn

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NGSS.HS-PS1-1